feat(battle-engine): full Unity/VFX/god-object shims + expanded copy closure (2570 files)

Authored Unity primitive/object-model shim, VFX layer (control-flow-preserving, InstantVfx never invokes its action -- headless suppression), god-object stubs (GameMgr/EffectMgr/UIManager with faithfully-extracted nested enums), View/UI/Touch tree, LitJson+BetterList+Tuple copied, third-party stubs. Discovered Roslyn header-error masking: fixing class-header type errors unmasks body references, so the true copy closure is ~2570 files (was 782 under masking). Errors: masked-25720 -> 268; our shim files compile clean. Remaining: ~50 residual shim/external types, 24 NGUI UI-base overrides, static-type fixes, plus likely 1-2 more unmask waves.

SVSim.BattleEngine/Engine/MecanimStateBase.cs

@@ -0,0 +1,95 @@
+using UnityEngine;
+
+public class MecanimStateBase : MonoBehaviour
+{
+	[SerializeField]
+	private string m_openStateName;
+
+	[SerializeField]
+	private string m_closeStateName;
+
+	[SerializeField]
+	private MecanimStateBase m_autoNextState;
+
+	public string OpenStateName
+	{
+		get
+		{
+			return m_openStateName;
+		}
+		set
+		{
+			m_openStateName = value;
+		}
+	}
+
+	public string CloseStateName
+	{
+		get
+		{
+			return m_closeStateName;
+		}
+		set
+		{
+			m_closeStateName = value;
+		}
+	}
+
+	public MecanimStateBase NextState
+	{
+		get
+		{
+			return m_autoNextState;
+		}
+		set
+		{
+			m_autoNextState = value;
+		}
+	}
+
+	public bool DontMove { get; private set; }
+
+	public virtual bool onOpenRequest(MecanimStateBase prev, bool isSkip)
+	{
+		return true;
+	}
+
+	public virtual void onOpen()
+	{
+		DontMove = false;
+	}
+
+	public virtual void onUpdateOpenAnim()
+	{
+	}
+
+	public virtual void onFinishOpenAnim()
+	{
+	}
+
+	public virtual bool onCloseRequest(MecanimStateBase next, bool isSkip)
+	{
+		return true;
+	}
+
+	public virtual void onClose()
+	{
+		DontMove = true;
+	}
+
+	public virtual void onUpdateCloseAnim()
+	{
+	}
+
+	public virtual void onFinishCloseAnim()
+	{
+	}
+
+	public virtual void onMove()
+	{
+	}
+
+	public virtual void onNotify(int value)
+	{
+	}
+}